#1F3C9B#1F3C9B

#1F3C9B is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.9% C 0.159 H 266.1°. Best body text is #FFFFFF at 9.64:1 contrast (WCAG AA passes).

Color values

HEX	#1F3C9B
RGB	rgb(31, 60, 155)
HSL	hsl(226, 67%, 36%)
HSV	hsv(226, 80%, 61%)
CMYK	cmyk(80%, 61.3%, 0%, 39.2%)
CIE-LAB	lab(29.13, 25.46, -54.76)
CIE-LCH	lch(29.13, 60.40, 294.94°)
OKLab	oklab(39.87% -0.0107 -0.1583)
OKLCH	oklch(39.87% 0.159 266.1)
XYZ	xyz(8.0952, 5.8886, 31.7140)
Luminance	0.0589 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3C9B #9B7E1F

analogous

#1F7A9B #1F3C9B #401F9B

triadic

#1F3C9B #9B1F3C #3C9B1F

tetradic

#1F3C9B #9B1F7A #9B7E1F #1F9B40

square

#1F3C9B #9B1F7A #9B7E1F #1F9B40

split-complementary

#1F3C9B #9B401F #7A9B1F

monochromatic

#0B1535 #152868 #1F3C9B #2950CE #5776DD

Accessibility & contrast

On white

9.64

#1F3C9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#1F3C9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3C9B

9.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3C9B	#FFFFFF	#000000	##FFFFFF
##1F3C9B	1.00	9.64	2.18	9.64
#FFFFFF	9.64	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9E

Deuteranopia (green-blind)

#003F99

Tritanopia (blue-blind)

#005465

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1f3c9b;
/* rgb */ color: rgb(31, 60, 155);
/* oklch */ color: oklch(39.9% 0.159 266.1);

Tailwind

colors: {
  custom: {
    50: '#7071b9',
    500: '#1f3c9b',
    950: '#000000',
  },
}

SCSS

$custom: #1f3c9b;
$custom-light: #7071b9;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3c9b",
  "rgb": {
    "r": 31,
    "g": 60,
    "b": 155
  },
  "hsl": {
    "h": 225.968,
    "s": 66.667,
    "l": 36.471
  },
  "oklch": {
    "l": 0.39865,
    "c": 0.15868,
    "h": 266.1
  },
  "luminance": 0.0589
}

Semantic roles & 50–950 ramp

primary

#1F3C9B

secondary

#C1A855

accent

#C23EEA

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1F3C9B

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →